Tenant system for exchange

Abstract

Abstract PURPOSE:To contrive the convenience in using a telephone set at a multi-family house or a store using together with a house by constituting the titled system that respective groups of tenants are completely separated as for outgoing operation and incoming call can be received at even the tenant of a group other than the group at which the call arrives. CONSTITUTION:In case of a call-arrival at a trunk 11 corresponding to the tenant 20 in A-group, the telephone sets 13 and 14 ring. When thirty seconds lapses after the call-arrival, a call-arrival setting switch sets the telephone set 16 of B-group, and the telephone 16 rings. When an automatic answering system is set at the tenant 20 in A-group, if a call comes to the A-group, the telephone sets 13, 14, and 16 of both groups that are set for ringing, simultaneously start the ringing.

Inventors

• 👤 Yasunobu Nakayama
• 👤 中山　恭伸

Bibliographic Details